1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

<?php 

function uni_decode($s) { 

  preg_match_all('/\&\#([0-9]{2,5})\;/', $s, $html_uni); 

  preg_match_all('/[\\\%]u([0-9a-f]{4})/ie', $s, $js_uni); 

  $source = array_merge($html_uni[0], $js_uni[0]); 

  $js = array(); 

  for($i=0;$i<count($js_uni[1]);$i++) { 

    $js[] = hexdec($js_uni[1][$i]); 

  } 

  $utf8 = array_merge($html_uni[1], $js); 

  $code = $s; 

  for($j=0;$j<count($utf8);$j++) { 

    $code = str_replace($source[$j], unicode2utf8($utf8[$j]), $code); 

  } 

  return $code;//$s;//preg_replace('/\\\u([0-9a-f]{4})/ie', "chr(hexdec('\\1'))", $s); 

} 

function unicode2utf8($c) { 

  $str=""; 

  if ($c < 0x80) { 

     $str.=chr($c); 

  } else if ($c < 0x800) { 

     $str.=chr(0xc0 | $c>>6); 

     $str.=chr(0x80 | $c & 0x3f); 

  } else if ($c < 0x10000) { 

     $str.=chr(0xe0 | $c>>12); 

     $str.=chr(0x80 | $c>>6 & 0x3f); 

     $str.=chr(0x80 | $c & 0x3f); 

  } else if ($c < 0x200000) { 

     $str.=chr(0xf0 | $c>>18); 

     $str.=chr(0x80 | $c>>12 & 0x3f); 

     $str.=chr(0x80 | $c>>6 & 0x3f); 

     $str.=chr(0x80 | $c & 0x3f); 

  } 

  return $str; 

} 

$str='%u5927%u5BB6%u597D%uFF0C我是孤魂！<br />\u8FD9\u662F\u6D4B\u8BD5\u6587\u672C\uFF01'; 

echo uni_decode($str); // 大家好，我是孤魂！这是测试文本！ 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

function phpescape($str){

  preg_match_all("/[\x80-\xff].|[\x01-\x7f]+/",$str,$newstr);

  $ar = $newstr[0];

  foreach($ar as $k=>$v){

    if(ord($ar[$k])>=127){

      $tmpString=bin2hex(iconv("GBK","ucs-2",$v));

      if (!eregi("WIN",PHP_OS)){

        $tmpString = substr($tmpString,2,2).substr($tmpString,0,2);

      }

      $reString.="%u".$tmpString;

    } else {

      $reString.= rawurlencode($v);

    }

  }

  return $reString;

}